标题： 辐射环周围常规黑洞图像中的偏振分布 显示英文标题

标题： Polarization distribution in the image of a synchrotron emitting ring around a regular black hole

摘要： 在常规 Hayward 和 Bardeen 黑洞时空中的同步辐射环的偏振图像被研究。这些常规黑洞通过引力与非线性电动力学耦合携带磁场。结果表明，这些两个常规黑洞时空中的发射环的偏振图像的主要特征是相似的。随着磁荷参数的增加，在 Hayward 和 Bardeen 黑洞时空中的图像平面中偏振强度和电矢量位置角都会增加。此外，在 Hayward 黑洞时空中的发射环图像中的偏振强度和电矢量位置角更接近 Schwarzschild 情况。在 Hayward 黑洞时空中，磁荷参数对 Strokes $Q-U$ 环的影响也稍小。储存在 Hayward 和 Bardeen 黑洞周围偏振图像中的信息可能有助于理解常规黑洞以及与非线性电动力学耦合的引力。 显示英文摘要

摘要： The polarized images of a synchrotron emitting ring are studied in the regular Hayward and Bardeen black hole spacetimes. These regular black holes carry a magnetic field in terms of gravity coupled to nonlinear electrodynamics. Results show that the main features of the polarization images of the emitting rings are similar in these two regular black hole spacetimes. As the magnetic charge parameter increase, the polarization intensity and the electric vector position angle in the image plane increase in Hayward and Bardeen black hole spacetimes. Moreover, the polarization intensity and electric vector position angle in the image of the emitting ring in the Hayward black hole spacetime are closer to those in the Schwarzschild case. The effects of the magnetic charge parameter on the Strokes $Q-U$ loops are also slightly smaller in the Hayward black hole spacetime. This information stored in the polarization images around Hayward and Bardeen black holes could help understand regular black holes and the gravity coupled to nonlinear electrodynamics.